1 files changed, 103 insertions, 0 deletions
diff --git a/vendor/scssphp/scssphp/src/Parser/KeyframeSelectorParser.php b/vendor/scssphp/scssphp/src/Parser/KeyframeSelectorParser.php
new file mode 100644
index 000000000..0a89bf0a1
--- /dev/null
+++ b/vendor/scssphp/scssphp/src/Parser/KeyframeSelectorParser.php
@@ -0,0 +1,103 @@
+<?php
+
+/**
+ * SCSSPHP
+ *
+ * @copyright 2012-2020 Leaf Corcoran
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ *
+ * @link http://scssphp.github.io/scssphp
+ */
+
+namespace ScssPhp\ScssPhp\Parser;
+
+use ScssPhp\ScssPhp\Exception\SassFormatException;
+use ScssPhp\ScssPhp\Util\Character;
+
+/**
+ * A parser for `@keyframes` block selectors.
+ *
+ * @internal
+ */
+final class KeyframeSelectorParser extends Parser
+{
+    /**
+     * @return list<string>
+     *
+     * @throws SassFormatException
+     */
+    public function parse(): array
+    {
+        return $this->wrapSpanFormatException(function () {
+            $selectors = [];
+
+            do {
+                $this->whitespace();
+                if ($this->lookingAtIdentifier()) {
+                    if ($this->scanIdentifier('from')) {
+                        $selectors[] = 'from';
+                    } else {
+                        $this->expectIdentifier('to', '"to" or "from"');
+                        $selectors[] = 'to';
+                    }
+                } else {
+                    $selectors[] = $this->percentage();
+                }
+                $this->whitespace();
+            } while ($this->scanner->scanChar(','));
+            $this->scanner->expectDone();
+
+            return $selectors;
+        });
+    }
+
+    private function percentage(): string
+    {
+        $buffer = '';
+
+        if ($this->scanner->scanChar('+')) {
+            $buffer .= '+';
+        }
+
+        $second = $this->scanner->peekChar();
+
+        if (!Character::isDigit($second) && $second !== '.') {
+            $this->scanner->error('Expected number.');
+        }
+
+        while (Character::isDigit($this->scanner->peekChar())) {
+            $buffer .= $this->scanner->readChar();
+        }
+
+        if ($this->scanner->peekChar() === '.') {
+            $buffer .= $this->scanner->readChar();
+
+            while (Character::isDigit($this->scanner->peekChar())) {
+                $buffer .= $this->scanner->readChar();
+            }
+        }
+
+        if ($this->scanIdentChar('e')) {
+            $buffer .= 'e';
+            $next = $this->scanner->peekChar();
+
+            if ($next === '+' || $next === '-') {
+                $buffer .= $this->scanner->readChar();
+            }
+
+            if (!Character::isDigit($this->scanner->peekChar())) {
+                $this->scanner->error('Expected digit.');
+            }
+
+            while (Character::isDigit($this->scanner->peekChar())) {
+                $buffer .= $this->scanner->readChar();
+            }
+        }
+
+        $this->scanner->expectChar('%');
+        $buffer .= '%';
+
+        return $buffer;
+    }
+}